UPX vs smali/baksmali: 2026 Comparison
UPX is a free offensive security tool. smali/baksmali is a free offensive security tool. Compare features, ratings, integrations, and community reviews side by side to find the best offensive security fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Developers and security teams shipping binaries for resource-constrained environments will get the most from UPX, which reduces executable size by 40-70% while maintaining full functionality and enabling faster deployment cycles. UPX has packed over a billion executables across embedded systems, IoT devices, and legacy infrastructure since 1996, proving its stability across ARM, x86, and MIPS architectures. Skip this if your threat model centers on preventing reverse engineering; packers obscure code but don't encrypt it, and determined adversaries will unpack your binary regardless of compression ratio.
Android security teams and red teamers doing malware analysis need smali/baksmali because it's the only tool that reliably converts Dalvik bytecode back to human-readable assembly, something closed-source decompilers routinely botch on obfuscated samples. The 6,608 GitHub stars reflect actual usage across threat intelligence shops and forensics labs where the open-source codebase lets you patch it when vendors' tools fail. This isn't for buyers wanting a polished UI or one-click threat scoring; you're reading assembly code by hand and the learning curve is real.
